# GD&T vs Machining Advisor Pro

The clearest difference is ads: GD&T at none against Machining Advisor Pro's shown. Machining Advisor Pro's advantage is update cadence (every 6 weeks vs every 11 months). On price, in-app purchases, device support and iOS requirement there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

GD&T ships an update every 11 months, Machining Advisor Pro every 6 weeks. The most recent releases landed on October 26, 2026 and November 2, 2026 respectively.

## The numbers

| Metric | GD&T | Machining Advisor Pro |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[4.0 (164 ratings)](https://appshunter.io/ios/app/machining-advisor-pro/id1321154225/reviews)** |
| Number of ratings | — | **164** |
| Positive reviews | — | 17.2% of reviews |
| In-app purchases | No | No |
| Ads | **No** | Yes |
| Update frequency | Every 11 months | **Every 6 weeks** |
| Monetization | — | Ad-supported |
| Size | 56 MB | 61 MB |
| Requires iOS | 15.0 | 15.0 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Carl Zeiss AG](https://appshunter.io/developer/488066215) | [HARVEY TOOL COMPANY, LLC](https://appshunter.io/developer/1321041519) |

## What reviewers say

### GD&T

[App page](https://appshunter.io/ios/app/gd-and-t/id627973440)

**In-app purchases:** none


### Machining Advisor Pro

[App page](https://appshunter.io/ios/app/machining-advisor-pro/id1321154225)

This app provides recommended running parameters for CNC machining, specifically for Helical Solutions and Harvey Tool products. It generates customized speeds and feeds based on your end mill, tool path, material, and machine setup, optimizing metal removal rates and shop productivity.

**Highlights:** CNC speeds and feeds calculator, Optimized for 30,000+ products, Supports 300+ material grades, Intuitive user interface, Customized setup options, Quick search functionality

**Features:** macOS Compatibility

**In-app purchases:** none

**What reviewers like**

- 💡 Great concept, potential
- 💡 Modern milling data
- 💡 Great alternative to desktop
- 💡 Great App, highly recommend

**What reviewers complain about**

- 🐛 Buggy, same as website
- 🐛 Interface hides submit button
- 🐛 Can't find common alloys
- 🐛 Website works better
- 🐛 Doesn't find tools by part number

**Reported bugs**

- Unable to input info beyond tool and material
- Tool path type not working
- Machine spindle not working
- Tool holder not working
- Won't open right now

**Requested features**

- Quick list for daily tools
- Ability to adjust radial depth of cut
- Allow finishing input without resetting


## Frequently asked questions

### Is GD&T free?

GD&T is free to download, with no in-app purchases.

### Is Machining Advisor Pro free?

Machining Advisor Pro is free to download, with no in-app purchases.

### Do GD&T or Machining Advisor Pro have ads?

Machining Advisor Pro shows ads; GD&T does not.

### Which is updated more often, GD&T or Machining Advisor Pro?

GD&T ships an update every 11 months, and Machining Advisor Pro every 6 weeks. Most recently, GD&T was updated on October 26, 2026 and Machining Advisor Pro on November 2, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*